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Proceedings Paper

Theoretical and experimental investigations of the dynamic range of high-frequency coherent AM optical links using semiconductor lasers
Author(s): Delfin Jay M. Sabido; Masafumi Tabara; Thomas K. Fong; C. L. Lu; Leonid G. Kazovsky
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Paper Abstract

In this paper, we theoretically and experimentally investigate the spurious-free dynamic range of an externally modulated coherent AM optical link. The coherent link's performance is also compared to a similar direct detection link. Semiconductor lasers are used as the optical transmitter and local oscillator lasers. However, the wide linewidth of semiconductor lasers can cause substantial performance degradation of coherent links. We show that by using a coherent receiver structure consisting of a wideband filter, rectifier and narrowband lowpass filter, and by selecting a wide enough bandpass filter, the coherent AM link can be made linewidth-insensitive. We also show that for low optical powers, the coherent AM link has a better spurious-free dynamic range than a similar direct detection link, and that laser RIN is not a significant effect.

Paper Details

Date Published: 1 November 1993
PDF: 9 pages
Proc. SPIE 2024, Multigigabit Fiber Communication Systems, (1 November 1993); doi: 10.1117/12.161323
Show Author Affiliations
Delfin Jay M. Sabido, Stanford Univ. (United States)
Masafumi Tabara, Stanford Univ. (United States)
Thomas K. Fong, Stanford Univ. (United States)
C. L. Lu, Stanford Univ. (United States)
Leonid G. Kazovsky, Stanford Univ. (United States)

Published in SPIE Proceedings Vol. 2024:
Multigigabit Fiber Communication Systems
Leonid G. Kazovsky; Karen Liu, Editor(s)

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